Caster



FIG. 1 is a first perspective view of a first embodiment of a caster showing our new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right view thereof;

FIG. 8 is a left view thereof;

FIG. 9 is an enlarged sectional view indicated in FIG. 3;

FIG. 10 is an enlarged sectional view indicated in FIG. 5;

FIG. 11 is a first perspective view of a second embodiment of a caster showing our new design;

FIG. 12 is a second perspective view thereof;

FIG. 13 is a front view thereof;

FIG. 14 is a back view thereof;

FIG. 15 is a top view thereof;

FIG. 16 is a bottom view thereof;

FIG. 17 is a right view thereof;

FIG. 18 is a left view thereof;

FIG. 19 is an enlarged sectional view indicated in FIG. 13;

FIG. 20 is an enlarged sectional view indicated in FIG. 15;

FIG. 21 is a first perspective view of a third embodiment of a caster showing our new design;

FIG. 22 is a second perspective view thereof;

FIG. 23 is a front view thereof;

FIG. 24 is a back view thereof;

FIG. 25 is a top view thereof;

FIG. 26 is a bottom view thereof;

FIG. 27 is a right view thereof;

FIG. 28 is a left view thereof;

FIG. 29 is an enlarged sectional view indicated in FIG. 23; and,

FIG. 30 is an enlarged sectional view indicated in FIG. 25. 

CLAIM The ornamental design for a caster, as shown and described. 